20515452 has 24 divisors (see below), whose sum is σ = 48774096. Its totient is φ = 6709248.

The previous prime is 20515393. The next prime is 20515463. The reversal of 20515452 is 25451502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15493 + ... + 16764.

It is an arithmetic number, because the mean of its divisors is an integer number (2032254).

Almost surely, 2^20515452 is an apocalyptic number.

It is an amenable number.

20515452 is an abundant number, since it is smaller than the sum of its proper divisors (28258644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20515452 is a wasteful number, since it uses less digits than its factorization.

20515452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32317 (or 32315 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 20515452 is about 4529.3986355807. The cubic root of 20515452 is about 273.7539304288.

Adding to 20515452 its reverse (25451502), we get a palindrome (45966954).

It can be divided in two parts, 2051 and 5452, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 20515452 in words is "twenty million, five hundred fifteen thousand, four hundred fifty-two".